Combined approach for optimal sensor placement and experimental verification in the context of tower-like structures

  • When it comes to monitoring of huge structures, main issues are limited time, high costs and how to deal with the big amount of data. In order to reduce and manage them, respectively, methods from the field of optimal design of experiments are useful and supportive. Having optimal experimental designs at hand before conducting any measurements is leading to a highly informative measurementWhen it comes to monitoring of huge structures, main issues are limited time, high costs and how to deal with the big amount of data. In order to reduce and manage them, respectively, methods from the field of optimal design of experiments are useful and supportive. Having optimal experimental designs at hand before conducting any measurements is leading to a highly informative measurement concept, where the sensor positions are optimized according to minimal errors in the structures’ models. For the reduction of computational time a combined approach using Fisher Information Matrix and mean-squared error in a two-step procedure is proposed under the consideration of different error types. The error descriptions contain random/aleatoric and systematic/epistemic portions. Applying this combined approach on a finite element model using artificial acceleration time measurement data with artificially added errors leads to the optimized sensor positions. These findings are compared to results from laboratory experiments on the modeled structure, which is a tower-like structure represented by a hollow pipe as the cantilever beam. Conclusively, the combined approach is leading to a sound experimental design that leads to a good estimate of the structure’s behavior and model parameters without the need of preliminary measurements for model updating.show moreshow less

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Metadaten
Document Type:Article
Author: Ina Reichert, Peter Olney, Prof. Dr. rer. nat. Tom LahmerORCiDGND
DOI (Cite-Link):https://doi.org/10.1007/s13349-020-00448-7Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20210804-44701Cite-Link
URL:https://link.springer.com/article/10.1007/s13349-020-00448-7
Parent Title (English):Journal of Civil Structural Health Monitoring
Publisher:Heidelberg
Place of publication:Springer
Language:English
Date of Publication (online):2021/07/30
Date of first Publication:2020/11/21
Release Date:2021/08/04
Publishing Institution:Bauhaus-Universität Weimar
Institutes and partner institutions:Fakultät Bauingenieurwesen / Graduiertenkolleg 1462
Volume:2021
Issue:volume 11
Pagenumber:12
First Page:223
Last Page:234
Tag:experimental validation; fisher-information matrix; mean-squared error; tower-like structures
GND Keyword:Strukturmechanik; Finite-Elemente-Methode
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften
BKL-Classification:31 Mathematik / 31.80 Angewandte Mathematik
Licence (German):License Logo Creative Commons 4.0 - Namensnennung (CC BY 4.0)